Elevator.



N0. 709,732. Patented sept. 23, |902.

` c. L. BALnwlN &.o. A. GREEN.

ELEVATR.

Ulpplication fxled )Bec 28, 1901.) (No Model.) l 3 Sheets-Sheet l.

.l llllm.

@Hom/tajo 1 www AZ 1H: Nonms PETERS so. pHoro-umn.. wsmNGToN. n. c`

No. 709,732. Patented Sept. 23, |992.

C. L. BALDWIN & 0. A. GREEN.

ELEVATOR.

(Application tiled De. 28, 19.01.) (No `Mdel.) 3 Sheets-Sham 2.

No. 709,732. Patented Sep'i 23, |902. C. L. BALDWIN 0. A. GREEN.

E LEVAT 0R.

`App1ication filed Dec. 28, 1901.)

3 Sheets-Sheet 3.

No Model.)

CHARLES L. BALDWIN AND OLLIE A. GREEN, OF NEW YORK, N. Y.; SAID BALDWIN ASSIGNOR TO MAUD E. BALDWIN, OF NEW YORK, N. Y.

ELEVATOR.

SPECIFICATION forming part of Letters Patent 1\T o. 709,732, dated September 23, 1902.

Application filed December 28,1901. Serial No. 87.643. (No model.)

To @ZZ wiz/07a it 'rn/ty concern:

Be it known that we, CHARLES L. BALDWIN and OLLIE A. GREEN, citizens of the United States, residing at New York, in the State of New York, have invented a new and useful Elevator, of which the following is a specification.

This invention relates generally to elevators, and more particularly to one designed for use in the construction of buildings for the purpose of transporting wheelbarrows of brick or other material from the ground floor to the upper portions of the building and also forcarrying down unloaded barrows to the grou ud floor for reloading.

The object of the invention is to provide an elevator for this purpose in which the loading and unloading operations will be greatly facilitated, thereby enabling such operations to be more quickly accomplished than heretofore.

Another object of the invention is to'provide a signaling device to be used in connection with the elevator whereby the engineer at the bottom of the structure is notified of the unloading of the elevator, so that the eugine can be reversed and the elevator permitted to descend.

Another object of the invention is to provide an elevator of such construction that the unloaded wheelbarrows can be placed thereon prior to the Withdrawal of the loaded wheelbarrows and without interfering; with the said loaded barrows.

Another object of the invention is to provide for the automatic release and discharge of the unloaded barrowswhen the elevator reaches the ground door of the construction.

With these various objects in view the invention consists, essentially, in providing an ordinary elevator with a supplemental platform arranged above the main platform or door of the elevator, said supplemental platform being adapted to receive and carry the unloaded barrows, said unloaded barrows being conveyed to the said platform by means of an inclined skid, and each skid is automatically released the moment the empty barrow is properly arranged upon the supplemental platform.

The invention also includes means arranged adjacent to the ground floor of the construction whereby the supplemental platform is tilted or inclined upwardly, thereby releasing and discharging the empty barrow therefrom at the same time the main platform or floor of the elevator is brought into position to receive the loaded barrow.

The invention consists also in certain details of construction and novelties of combination, all of which will be fully described hereinafter and pointed out in the claims.

lu the drawings forming a part of this specitication, Figure l is a perspective view illustrating the elevator as raised to the top floor of the structure, the inclined skids being also raised ready to receive the unloaded barrows, the loaded and unloaded barrows being omitted from this illustration for the purpose of more clearly illustrating the construction of the elevator and its parts. Fig. 2 is a bottom plan view of the supplemental platform. Fig. S is a detail in perspective of the skid-supporting bar as viewed from the under side. Fig. 4 is a detail sectional view of the said bar, the tripping-arm connected thereto being shown in elevation. Fig. 5 is a diagrammatic elevation illustrating the complete operation of the invention, the ground and top floors of the structure heilig shown in section. This view illustrates the position of the various parts after the elevator has arrived at the top floor of the structure, an unloaded barrow rolled up the skid, as indicatedin dotted lines, and placed upon the supplemental platform. Eig. 6 is a view, partly in elevation and partly in section, illustrating the operation of the supplemental platform when it reaches the limitofits downward mo vement,said platform being shown in the act ot releasing and discharging'the unloaded barrow therefrom, the loaded barrow being loaded upon the main platform of the elevator, as indicated in dotted lines to the leftof the figure. Fig. 7 isa detail perspective view illustrating the end of the skid. Fig. 8 is a longitudinal sectional view of said end, the dotted lines indicating the position the parts assume during the downward passage of the elevator; and Fig. 9 is a bottom plan view of said end of skid, and Fig. 10 is a detail perspective view illustrating the means for adjusting the upper end IOC) ot' the guide-bar for elevating the supplemental platform. i

In the practical embodiment of our invention we employ an elevator comprising the main floor or platform A, which is carried by the ordinary and usual uprights A', connected by the cross-bar A, to which the elevatingropes A3 are attached, the uprights working, as usual, between the guides A4, said guides extending'froin the bottom to the top of the structure.

Our invention, as before stated, is particularly designed for elevating and lowering wheelbarrows during the construction of buildings, and in practice we prefer to make our elevators of such size that two barrows arranged side by side can be conveniently carried upon the main platform or floor, and it will of course be understood that the elevator can be made of such size as to receive as many or as few barrows as the necessity of the case may require.

Upright standards B are attached to the rear corners of the main platform and extend upwardly therefrom. A cross-bar B', preferably of channel-iron, is connected to the uprights A a definite distance above the main floor or platform A. Supported upon this cross-bar B are the channel-bars B2, the rear ends of said channel-bars being supported upon the cross-rod B3, which connects the upper ends of the upright standards B. Resting upon the channel-bars B2 is the supplemental platform C, the timbers of which are securely connected tothe angle-irons C, arranged upon the under side of said platform, the rear ends of said angle-irons C' being pivoted to the cross-rod B3 upon the inner sides of the upright standards B, thereby pivot-ally connecting the supplemental platform C at its rear end to the rod B3. The angle-irons C normally rest upon the crossbar B'. Inclined brace-rods B4 extend from the upper ends of the uprights B to the main platform Aor floor A, thereby bracing the said standards and also serving as stops to limit the rearward movement of wheelbarrows rolled upon the main platform or iioor A.

Each chan nel-bar B2 has a slide bar or bolt D arranged in` its forward end and projecting a short distance beyond said forward end, said bar or bolt being held in place by means of pins D', passing through the longitudinal slots D2, produced in the sides of the channelbar, and a coil-spring D3, surrounding a pin D4,which works through a transverse plate D5, normally holds each bar or boit in its forwardly-projecting position. These bolts or bars D are adapted to engage the free ends of `the skids E, which are pivoted at E to the.

upper fioor of the' structure, and owing to the engagement of the bars or bolts D with the free ends of these skids the said skids will be elevated and held in such inclined positions, as most clearly indicated in Figs. l and 5. Theseskids are only arranged upon the floor where the material elevated is to be used,

down,

and when the elevator has reached such floor and has been stopped the empty7 wheelbarrows are first rolled up the skids and placed upon the supplemental platform C. Each bar or bolt D is provided with an upwardlyprojecting arm F, which works in a slot F', produced in the supplemental platform, and said arm is of such height and shape that when the empty wheelbarrow is rolled upon the supplemental platform a leg or cross-bar of the said wheelbarrow will engage the said arm, forcing it rearwardly and withdrawing the bar or bolt. Such movement of the bar or bolt immediately releases its respective skid, and the said skids drop by their own weight and rest upon the iioor. The empty wheelbarrows have now been securely arranged upon the supplemental platform and the way is clear for the removal of the loaded wheelbarrows.

In connection with the elevator we employ a signaling operating mechanism at the uppel1 floor, which is operated by the withdrawal of the last loaded wheelbarrow from the main floor or platform of the elevator, so that the engineer can be notified when said elevator is ready -to be lowered, and in arranging such signaling mechanism we employ a lever G, which is pivoted between two guide-pieces G', arranged adjacent to the edge of the elevatorshaft in such a manner that as the wheel of the barrow passes between the said guides the lever G will be operated, which in turn operates a lever G2 by means of a rod G3, and this lever G2 transmits its motion through a wire G4L and one or more bell-cranks G5 to the bell or gong G6. `By means of this device the engineer will be notified at the proper time. In case a workman is employed to remove each loaded wheelbarrow, it is intended that they shall move them simultaneously, and in case only one workman is intended to remove the two or more wheelbarrows those which do not come in contact with the operating-lever will be removed first andthe wheelbarrow which does come in contact with the operating-lever removed last, I so that all danger of a premature descent of the elevator is avoided. As the elevator descends the forwardly-projecting bar or bolt D will of course contactwith the free end of the skid, and in order to compensate for such contact we provide the said skid with a pivoted end E2, said end being arranged in a channel-plate E3', which is pivotally connected to the rigid portion of the skid by means of a bolt E, and surrounding said bolt is a coiled spring E5, one end of which bears against the end of the rigid portion of the skid and the other end against the pivoted portion, the tendency of said spring being to normally hold the end E2 in alinement with the skid E, said spring, however, permitting the end E2 to be turned as indicated in Fig. 8, during the downward movement of the elevator, thereby avoiding damage to the skid, and the moment the elevator has passed the said spring IOO will throw the end E2 up to its normal posi tion ready to receive the bar or bolt D upon its next upward movement.

Adjacent to the lower floor of the structure we arrange the guide-bars H, the lower ends being rigidly secured to the upright guides A4, and the upper ends of said guide-bars are secured, preferably, to the floor above the floor of the structure, and in order to compensate fordifferent heights of floors we provide longitudinal slots H in the upper ends of the bars H and connect the extension-bars H2 to said slotted ends by means of bolts H3, the upper end of the extension-bar being bent, as shown at H4, to rest upon the floor.

The supplemental platform carries guiderollers l at each forward corner, which guiderollers are adapted to contact with the guide- `bars H, and said bars H are Acurved in such a manner that. as the elevator continues to descend after the rollers have come in contact with said guide-bars the supljdemental platform C will be elevated and inclined, as most clearly shown in Fig. G, said platform swinging upon its pivot at the rear end, and it is elevated or inclined tc such an angle that the leg or crosshar engaging the arm l" is `carried over the top of said arm as the arm remains stationary, while the platform is tilted, andthe wheelbarrow will immediately roll from the supplemental platform upon an iuclined guideway which is arranged upon the ground floor of the structure adjacent to the elevator-shaft, the upper end of said inclined guideway heilig in such position as to receive the wheel and legs of the empty barrow witlr ou t jolting. At the same time that the empty barrow is automatically discharged from the supplemental platform the loaded barrow or barrows are rolled upon the main floor or platform of the elevator and the signal given the engineer for raising the elevator.

The elevator is then raised, andthe supplemental platform resumes its normal or horizontal posit-ion upon the channel-bars B2 and cross-barB' as soon as it reaches a point above the guide rail or bar H. When the upper floor of the structure is reached, the opera tions hereinbefore described are repeatedthat is, the skids are raised automatically, the empty wheelbarrow is rolled upon the supplemental platform, the skids dropped automatically, and the loaded wheelbarrows withdrawn Vfrom the lower or main platform of the elevator, one of said wheelbarrows operating a signal notifying the engineer that the unloaded barrows have been placed upon the elevator and theloaded barrows removed therefrom. v

It will thus be seen that we provide an exceedingly simple and efficient construction of elevator capable of carrying out all the objects hereinbefore mentioned.

Having thus fully described oui-invention, what we claim as new, and desire to secure by Letters Patent, is-

form arranged above the main door or platform in combination with the hinged skids adapted to rest upon the supplemental platform, and means for automatically releasing the said skids, as set forth.

It. An elevator having asupplemental plat form arranged above the main floor or platform and pivoted at its rear end, in combination with means for elevating and inclining the said supplemental platform for the purpose described.

5. Au elevator having a supplemental platform arranged above the main floor or platform, in combination with the hinged skids, and the spring-actuated bars or bolts carried by the supplemental platform adapted to hold the said skids elevated, and means for releasing said bars or bolts, substantially as set forth.

6. An elevator having a supplemental platform arranged above the main platformor floor, said supplemental platform being provided with forwardly-projecting'springactu ated bars or bolts, each bar or bolt having an upwardly-projecting arm working in a slot produced in the platformin combination with the hinged skids, each skid having a hinged cud, for the purpose described.

7. The combination with theelevator having a supplemental platform arranged above the main floor or platform, said supplemental platform beine` pivoted at its rear end and provided with guide-rollers at its forward ends, of the inclined side bars upon which, the guide-rollers are adapted to travel wherebythe supplemental platform is elevated or inclined, for the purpose described.

`S. The combination with the elevator having a supplemental platform arranged above the main platform and pivoted at its rear end and provided with guide-rollers at its forward end, of the guide-bars with which the guide-rollers are adapted to contact, said guide-bars having the adjustable extensions at their upper ends, as and for the purpose described.

CHARLES L. BALDWIN. OLLIE A. GREEN.

lVitnesses to Chas. L. Baldwin:

CHAs. E. BROCK, CLARENCE SHAW.

Witnesses to O. A. Green:

JOHN P. LEo, I. H. SMART.

IOS

IIO 

